Results 131 to 140 of about 117,874 (307)

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Earthquake effects on youth: understanding psychological challenges and support needs

BMC Psychology
The aim of this study is to examine the effects of the earthquake on the psychological symptoms of high school students, and to understand the readiness of school counseling services based on the available data. In this context, the research was designed
Mehmet Şam, Göcan Sever, Habibe Yildiz Yüksel, Ramin Aliyev   +3 more
doaj   +1 more source

The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations

Deep Underground Science and Engineering, EarlyView.
Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu, Hanyi Wang, Quan Gan, Shuang Zheng   +3 more
wiley   +1 more source

Fixing the Delta: How Will We Pay for It? [PDF]

, 2009
Reviews proposals for preserving the Sacramento-San Joaquin Delta, such as levee repair and construction of new reservoirs; the debate over beneficiary financing; and implications of recent court decisions.
Dean Misczynski
core  

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Dragon-kings: mechanisms, statistical methods and empirical evidence

, 2012
This introductory article presents the special Discussion and Debate volume "From black swans to dragon-kings, is there life beyond power laws?" published in Eur. Phys. J. Special Topics in May 2012.
A. Akaev, A. Helmstetter, A. Helmstetter, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. L’vov, A. Mignan, A. Sornette, A.T.Y. Lui, B. Voight, B. Voight, C. Ancey, C. Vanneste, C. Vauge, C.G. Bufe, C.G. Sammis, C.G. Sammis, C.J. Allègre, D. Amitrano, D. Plenz, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Vere-Jones, D.D. Bowman, D.D. Jackson, D.P. Schwartz, F.P. Schoenberg, G. Ouillon, G. Ouillon, G. Ouillon, G. Ouillon, G. Pruessner, G. Zöller, H. Nechad, H. Saleur, I. Main, I. Osorio, J. Janczura, J. Laherrère, J. Schmittbuhl, J. Schmittbuhl, J.-C. Anifrani, J.-L. Cabrera, J.C. Jaume, J.L. Cardy, J.M. Carlson, J.V. Andersen, K. Ide, L. de Arcangelis, L. Gil, L. Lamaignère, L.-E. Cederman, L.R. Sykes, M. Golosovsky, M. Mitzenmacher, M. Scheffer, M. Süveges, M.E.J. Newman, M.J. Alava, M.K. Sachs, M.R. Evans, M.R. Evans, N. Akhmediev, N. Fraysse, N.F. Johnson, O. Peters, P. Bak, P. Bialas, P. Jögi, P. Shebalin, P.J. Reynolds, R. Burridge, R.F. Smalley, S. Hergarten, S.C. Chapman, S.C. Chapman, S.G. Wesnousky, S.G. Wesnousky, S.P. Nishenko, S.P. Nishenko, T. Werner, V. Dakos, V.F. Pisarenko, V.F. Pisarenko, V.F. Pisarenko, V.I. Yukalov, V.I. Yukalov, W.R. McCann, X. Lei, X. Lei, Y. Huang, Y. Malevergne, Y.-F. Rong, Y.Y. Kagan, Z.-Q. Jiang   +108 more
core   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Disaster characteristics and policy implications of the MS6.2 Jishishan earthquake in Gansu Province

地震科学进展
On December 18, 2023, a magnitude 6.2 earthquake struck Jishishan County, located in the Linxia Hui Autonomous Prefecture of Gansu Province, resulting in significant casualties, building collapses, and various geological hazards.
Xu Wang, Benyong Wei, Yanjun Wen, Jiakang Wang, Wenhua Qi, Donghui Chen   +5 more
doaj   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source